At the posted coords is a structure in the shape of New Hampshire.
I have drove by this many times but never stopped to read it.
Well I finally did and low and behold it was about my Great Great Grandparents business.
I use to live right next door to them when I was just a little kid.
So I had to use this as a cache.
Engraved into the granite is the name of the buisness and where it is, and when it started.
You are looking for a three digit number to subtract from the North and West coords listed below.
N 43 06.435 W 71 28.741